I ordered only one shade in order to verify measurement/installation for an inside mount. Glad that I did. I ordered the 34.5 in. shade for a window that measured 35 inches (inside). When it arrived, I found that when the hardware was in place there was insufficient space to maneuver the shade into place. I thought that .5 in. would be sufficient. The shades are not EXACT. Allow a little extra space when measuring for an inside mount. Product is extremely well made, hardware sturdy and will look stunning. 34.5 goes back today and I've ordered three at 34 inches for my 35 in. inside mount!